Phenomenology and control of buckling dynamics in multicomponent colloidal droplets

Abstract

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Sodium dodecyl sulfate microaggregates with diversely developed surfaces: Formation from free microdroplets of colloidal suspension

“…Similarly, through hydrothermal route, [40] successfully synthesized 3D flower-like ZnO architectures assembled with numerous nanosheets with the aid of SDS. It has also been demonstrated that SDS is a highly effective structuredirecting agent for producing box-like structures [41] and is observed elsewhere to cause complete suppression of the buckling phenomenon above an optimal value of 1% by weight [42]. Additionally, Blanch et al [39] found out that attractive depletion in SDS was preferential for carbon nanotubes of larger diameter at higher concentrations of SDS.…”

“…The anionic surfactant, sodium dodecyl sulfate (SDS) is perhaps one of the most widely studied surfactant with unique physical properties [33][34][35][36] that has found many applications in science and technology. The role of SDS in evaporation-driven assembly of nanoparticles have been widely explored [6,29,[37][38][39][40][41][42]. For example, [37] used SDS as a capping agent to synthesise rose-like BiOBr nanostructures with exposed {111} facets via a facile solvothermal route.…”

Insights on drying and precipitation dynamics of respiratory droplets from the perspective of COVID-19

“…Given the experimental complexity associated with studying a mobile air-borne droplet, we have used an acoustic levitator to trap a droplet in the air (tec5) and allowed it to evaporate in a controlled ambience (T∞=28+0.2 °C, RH∞=41+2%). Acoustic levitation 26 has been extensively used to study the evaporation 27 and precipitation dynamics of a solute laden droplet 25,28,29,30 . A droplet of the surrogate fluid having an initial diameter D0=550 μm+10 μm is inserted into one of the stable nodes of the acoustic levitator and imaged every 3 seconds at 30 frames per second (see S1 of Supporting Information) till the end of evaporation.…”

Drying Pathways of an Evaporating Soft Matter Droplet

“…A soft matter droplet consisting of polymer solutions or colloidal dispersions can exhibit different morphologies such as buckling [1][2][3][4], wrinkling [5][6][7][8], or cavitation [9][10][11][12] during the drying process. When all solvents evaporate, the soft matter droplets can turn out to be solid, hollow, wrinkled or buckled particles as the final products [13][14][15][16][17].…”

“…When all solvents evaporate, the soft matter droplets can turn out to be solid, hollow, wrinkled or buckled particles as the final products [13][14][15][16][17]. This drying process, especially spray drying, has been widely utilised to produce micro-particles of different morphologies in industrial circumstances such as food or pharmaceutical particle production [17][18][19][20][21], amorphous material crystallisation [22][23][24], functional encapsulated particle manufacture [25][26][27], etc., where different shapes are achieved by empirically changing the drying temperature, concentration and constitution of the soft matter solution [3,[28][29][30][31][32][33][34].…”